Rope-drive elevator.



4 BHEETSSHBBT 1.

Patented Mar. 23, 1915.

E. BOENING. ROPE DRIVE ELEVATOR. APPLICATION FILED DB0. 17, 190B.

E. BOENING.

ROPE DRIVB ELBVATOR.

APPLICATION FILED DEG. 17, 1908.

Patented Mar. A23, 1915.

4 SHEETS-(SHEET 2.

@XZ/Leonce Rd. 1. 93 .lym 3 2M TUS n ms 4 Id n Lw. D..

E. BOBNING.

ROPE DRIVE BLEVATOR.

' APPLICATION FILED DBG 17. 190s 1, 1 32,76 1

In" w E. BOENING.

ROPE DRIVE ELEVATOR. APPLICATION FILED No.1?, 190e 4 SHEETS-SHEET 4.

5 Witwe/wao L iTEn sTATEs PATENT oiiEioE;`

ERNEST EOENING, or' YoNKERs, NEW' YORK, ASSIGNoR To oTis- ELEviiToE ooiviraivY, or JERSEY oiTY,- NEW JERSEY, A ooEPoRATIoN or NEW JERSEY.

ROPE-DRIVE ELEVATOR.

Application led December 17, 1908. Serial No.468,011.

A further object is to pro-vide van appara-` tus of this character in which there yis improved traction facility and equilibrated rope tension.

A further object is to provide improved means for preventing vibration of the cables and see-sawing of theV car and counterweights.

A still further object is to provide means.

for automatically relieving the tension on the driving cables whenever the car passes beyond its normal limit of travel in either direction, so that the cables can readily slip on the drive sheaves and thus prevent damto the apparatus in case the motors are not stopped at the proper time by the usual controlling and safety appliances. I l A still further object is to provide an improved apparatus of this character which shall be simple and durable, and effective and eilicient in operation.

For the attainment of'these ends and the accomplishment of other new and useful objects, the invention consists in the features of novelty in the construction, combination and arrangement o-f the several parts hereinafter more fully and completely described, and claimed in the appended claims.

Figure 1 is an elevation View, partly diagrammmaticl.. of an elevator system constructed in accordance with the present inventicn;l Fig. Qis a side view of a motor, and also showingihe pivot mounting of a tension beam to which the motor is secured;

' side views of the two motors shown in Fig.

3; Fig. 6 isan elevation view `showing still Specification of Letters Patent.- Patented B131. 23, A191.5.

other modifications, and Fig. 7 shows a still different arrangement combining featuresI shown in Figs. 1 and 3.

As shown in Fig. 1, two tractio-n motors M and M are employed. Endless traction ropes or cables are arranged in frictional contact with the drive sheaves or pulleys 12` and 15 secured to the armature shafts of the motors M and M', respectively, and extend vover guide sheaves13, 14, 16 and 17 jour-.

naled in bearings mounted on the overhead beams 40. The elevator `car C is connected to the drive cables 11 by meanso-f ropes or cables 28 attached to the cariand extending over the guidey Sheave vv18. The counterweight lV has a similar connection with the drive cables by means of cables 22 passing over the sheave 19. The motorsrun in the `same direction and are provided with the .usual or any desiredcontrolling and operating mechanism and electrical circuits. The motor M is-mounted in the usual way on a h solid base or support. The motor M- is Vino-tinted on beams 24 lwhich are pivoted at cine end by Imeans of a pivot pin 25 which eX.-

enlargement at the bottom of said recess. A

washer 29 may also be placed in said enlargement. The bolt 28 extends upwardly through the cross-bar 32 bolted to the beams 24. The bolt is threaded to receive adjustable nuts 34 and 37locat'ed below and above te'nds through the bearing blocks 26 and 27' the bar 32, respectively; Interposed between l the bar. 32 and the nut 34 are washers 33 and 35 and the coil spring36 surrounding the bolt between the said washers.

spring 39 and the washer 38 are placed 'between the upper nut 37 and Ithe`bz'1r32.v *Thef comes directly on the drive cables 1ly and therefore places' a constant tension on the cables.l This weight maybe partially supported by the spring 36, the tension on said spring being adjustable by means of the nut l 34. The springs 36 and 39 also form yielding stops 'to limit the movement ofthe motor M in either direction. l

. The arrangement above described has an advantage over the use vof a `*single motor, by providing a large traction surface for the cables 11 as secured by the use of the two traction sheaves 12 and 15. The use of the motor M itself as a means for placing tension on thecables dispenses with the use of additional weights for this purpose.

=In order to take the tension-off the drive cables and allow the motors to run free whenever the car exceeds its normallimit of travel in either direction, due to the failure of the usual safety devices to operate, or

from anyother cause, the following means provided. Located beneath the motor M is a piston or'plunger 87 movable up and down in the cylinder' 88. rl.`he plunger 87 carries the head 86, movable into engagement with the beams'24, which head, if desired,'may be made of some yielding material, such' as leather or rubber. A three-way valve `90 is adapted to connect eithera supply pipe 92 or an exhaust pipe 91 with 'av to-and-from pipe 89 leading from the valvelto the cylinder 88. 'll he pipe 92 is connected lto any suitable source of fluid pressure supply, preferably a liquid such as water or' oil. The valve is operated by means of an electromagnet 99. The core of this magnet is connected through alev-er 95 between the magnet frame and the stop pivoted at 96 and a link 94 to the operating lever 93 ofv the valve. A spring 98A placed 97 'on the core of the magnet holds the magnet core normally in its lowered position 'and the valve in position to establish communication between the exhaust 91 and the cylinder 88. Mounted for vertical movement in the overhead ybeam 40 are depending rods 102 and 103 located in the path of movement of stop devices 100l and 4101 carried by the car and counterweight, respectively. Operating ropes 105 and 106 are connected to the upper ends of these'rods, the opposite ends of'said ropes vbeing connected to a rope 107 leading downto an electric switch lever 108. The lever 108 is pivoted at 109 and carries the switch contact 114, movable-into engagement. with the stationary contact 111. The spring 110 holds the switch lever normally in open position. yWhenever the car moves upward beyond its normal limit of travel,

the stop 100 kstrikes the rod 102, moves thel latter upward, and pulls the ropes 105 and 107 upward to close the switchf108. In a similarmanner, when the car movesy downwardbelow its normal limit, the stop 101 on thefcounterweight raises the rod 103 and through theropes 106 and 107 closes the switch. When the switch is closed, a circuit l' lis established to the winding of the electromagnet 99, This circuit may be traced from f 'the beams 40.

the positive main, thrughthe switch contacts 114, 111, wire 113, winding of the electromagnet 99, and wire 112 to the negative main. y The magnet 99 being energized, operates the three-way valve 9.0 to establish communication between the' pressure supply and the cylinder 88, and thereby move the plunger 87 upward. The head 86 engages the beams 24 and lifts the latter upward so as to take the tension off the drive cables 11. The motors are therefore free to run independently of the cables so that the strain which would otherwiseI be placed on the motors,'cables and otherarts is.,y avoided. Springs 104 may be place A on the rods 102 and 103 and may be made of sufficient strength to act as buffers to assist in stopping the car or counterweight.

A somewhat different arra ement is shown in Fig. 3. The motor yMis mounted on pivoted beams 24 substantially as in Fig. 1, but the stationary motor M is in this instance located overheadbei.ng preferably mounted at the top` of the shaft upon In this arrangement the traction rope or cable`11 is connected directly to the car and' counterweight and forms with said parts a closed loop in frictional driving engagement with\ the motor traction sheaves 12 and 15. Attached to the beams 40 or some -other suitable part, are brackets 43, 44 to .which arepivoted at 56 and 57 the levers 41, 42. These levers 41, 42 are provided with openings 49 near their inner ends 48, throng-[lil which the rope 11 may pass freely. he springs 47 are adapted to maintabin the levers in a normal position.v To the arm-46V of, the lever 42 is attached a rope 51 which passes over pulleys 54, 55 and downward to a'switch lever 58. A rope 50 is secured to' the arm 45 of lever 41 and passes over` a pulley 53 and is secured to the rope 51 by some suitable means 52. The switch lever 58,'pivvoted at 59, carries a contact 60. When the vrope 51 raises the lever arm, the Contact :6 0 makes connection with a stationary Contact 61, thus closing a circuit from the supply mains to the winding of an electromagnet 62. This' circuit may be traced from the positive (-1-) supply mainy through wire 63, lever contact 60, contact 61, wire 64, through the magnet winding, thence through wire back to the negative supply main. When the car travels beyond 'its upper or lower normal limit of travel, the car or counterweight en- 'gages the lever 41 or 42, as the case may be,

When

the circuit to the magnet winding is closed, v the magnet core 63 is pulled inward-a'ndr`-`l operatesthe toggle joint, thereby raising the beams 24 and the motor M. A. weight w 41. and 42. The springs 47 .may also be may be mounted'on the beams 24 to increase.

the tension on vthe hoisting cables, and may be adjustable longitudinallyof the beamsto vary Lits effectiveness tol any' extent desired.

The action of the toggle Joint raising the beams relieves the strain on the rope 1l, caused by the weight ofthe motor M, its supporting apparatus, and the adjustable weight w. The bolt 28 which has been previousl)7 described `may be employed to limit the upward or downward inovement of the beams 24, and an additional device limiting the upward movement of -the same is show n,l comprising ya Vthreaded bolt S3 ad]ustable in a fixed nut 84 and located in position to form a stop for the beams-2 4. The relative positions of the motors M and M and their sheaves 12l and 15 are shown by the side views, Figs. 4 and- 5. Thetraction surface forlthe hoisting ropes may be .made as large as'necessar'y or'as desired by increasing`the `width of the `said pulley sheaves and the number of hoisting ropes or' cables-11.

-Figf 'shows Van arrangement of parts somewhat similar to Fig. -1, inv that both the motors are located at the bottom of the hatchway. The car and counterweight, however, areconnected 'directly to the hoisting cables 11 and form therewith an endless loop. The hydraulic device in Fig. 6 for lifting" the motor M when the car reaches its limits of travel is. similar.v to that shown in Fig. 1. The three-way valve 72, however, is in this instance mechanically opervated without the use of an electro-magnet.

The'valve lever 70 is connected to an operating rope 5l which extends upwardly to a guide pulley 71 on the overheadbeam 40, where the,rope branches, one branch being connected to a lever 4&1 pivoted to the bracket 43. and the other branch extending overfa guide pulley 71" and being connected to av lever 42 pivoted to a bracket'44. The driving cables 11 extend through openings fin-the inner ends ofl the levers 41 and 42 whichy are "adapted to be operated respectively by the counterweight and car asthe latter approaches its lower or upper limit of travel. The valve lever 70, .as shown in full lines, is in position to maintain communication between the cylinder 7 8 and the exhaust 7 3 by Way of the to-and-from pipe 76. Then either of the levers 41 or 42 is operated, ther/rope 51 moves the valve lever 70 to the dotted line position 74 and connects the pressure supply 75 to the cylinder 78 and operates the plunger 7 9 to lift the motor M and' reduce the driving tension on the cables, so that the drive sheaves will slip in the cables-as before explained. The weight 70 connected to the lower end of the rope 51 serves to return the valve lever,` 70 to normal position when the-car and counterweight areout of contact with the levers used, if desired, to return the levers to no rmal position, thereby reducing the dutyfle Vquired of tlieWeight-70.

Fig. 7 shows the same arrangement of cai and hoisting apparatus as disclosed ini Fig... 3. Hydraulic means' is employed, however,

in this instance for liftingthe motor M.

This hydraulic mechanism as shown is sub-` stantially like'that ofFig. 1,1and'therefore needs no further description. The valve operating electro-magnet' 99 isfcontrolled .by

the switchl 58 Whichtogether with the vswitch f operating mechanism is identical. with that 'shownin Fig. v3. i `With this'imp'roved 'arrangement it may be seen that since `the rope tension'is at all-times equilibrated,the vibratwo motors, and the arrangement ofone of lthe motors on the tension beams eqiiilibratesl the traction so thatthe lsee-sawing of the scope of the invention.

What I claim and desire tosecure 'by Letters Patent of the United States is:-

tion Vof the ropes or cablesyery limited, the traction surface is large because of the 1. The combination with an elevator car, l

of a driving rope or cable. therefor, means for applying tension tothe cable, and a Huid motor for relieving the said tension on the cable at a predetermined pointl inthe car..A

travel. a

' 2. The `combination, witha xed motor, of

-ia cable `forming an endless loop, a movable ulley suspended in motor having its drive a bight of the cable an placing a portion of the Weight of the motor on the cable', both of said motors driving saidy cable, and means for varying the amount of tensionA placed on the cable.

3. The combination with a ixedi'motor,y of an endlessoable loop, a movable motor,y

means comprising said movable motor'for applying tension to said cable, and means for automatically releasing the tension on the cable.

4. In elevator controlling apparatus, the combination with an elevator car,`of a'cable.

therefor, a fixed motor, a movable motor,

iis

means for utilizing the movable motoras a 4tension weight for said cable, and means for i* automatically cable. l l 5. In elevator controlling apparatus, the 4combination with. an elevator car, ofa rope with ends attached to the top and bottom of said car, a fixed motor, a movable motor,

means for utilizing the movable motor as a; :1.391

'reducing the' tension on the` IML tension Weight for the cable, and means associated with thel cable for automatically releasing the said tension.

6. The combination With an elevator car, of a cable therefor, means for applying a tension Weight to said cable, and a fluid operated motor associated with the cable and operable automatically to release the said tension When the car approaches certain limits. p

7. The combination with an elevator car-,-

motcr, means for utilizing saidI motor as a tension Weight for said cable, and means for releasing the tension on the cable when the car reaches a certain predetermined limit.

8.A The combination with an elevator car, of a cable and counterweight therefor, a fixed motor, a movable motor, operative connection between the car and both motors, means for utilizing the movable motor-zas a tension Weighton said cable, .a device for releasing said cable tension, and means for automatically operating .said releasing device.

9. 'The combination with an elevator car, of a rope or cable attached to the top and 'bottom of said car, a counterweight for the car, a fixed mctor, a movable motor utilized as a tension Weight for said cable, a device for releasing tension on the cable, and a lever operatively connected to said device and engaged by some moving part to automatical y actuate the device. v

21.0.- The combination' with an elevator car, kof a rope. or cable with its e'nds at- -tached tothe top and bottom of said car, a

countervveight for said car, a fixed motor, a

movable motor utilized as a tension Weight l for said'cable,means for releasing tension on said cable, and levers operatively connected to sald releasing means to automatically-control the same.

l1. The combination With an elevator car,

' of a rope or" cable With its ends attached to the top and bottom of the car, a counter- Weight, a fixed motor, beams pivoted at one end, a motor mounted thereon and forming a ltension Weight on the cable, and means for tilting said beams.

12. The combination With an elevator car, of a rope or cable having its ends attached to the top and bottom of the car, a counter- Weight for the car, a xed motor, beams pivoted at one end, a motor mounted thereon providing a tension Weight for said cable, means for tilting said beams, levers adjacent the cable, and connections between the levers and said last named means.

13, r,Ihe combination with an elevator car,

l of a rope or cable with ends attached to the top and bottom of the car, a counterweight forthe car, a fixed motor, beamsipivoted at one end,'a motor mounted' thereon providof fa cable and counterweight therefor, a.

adaaei ing a tensionf'weight for the cable, a lifting device for the free ends of the beams, means for operating said device to release tension on the cable, levers operatively connected to actuate the lifting device and automatically engaged by the car or counterweight to control the said device.

14. The combination with an elevator car, of a rope cable with ends attached to the top and bottom of the car, a counterweight for the car, a fixed motor, beams pivoted at one end, a motor mounted thereon providing a tension weight for the cable, a lifting device for the free ends of the beams, means for automatically operating the lifting device to release tension on the elevator cable, and y a 'device for limiting the vertical travel of the `free ends of the beams.

15. The combination with an elevator car, of a rope or cable with ends attached to the top and bottom of the car, a coun'terweight for the car, levers suitably arranged to be operated by contact With the car and counterweight, a fixed motor and a movable mntor directly driving the car by the. rope or cable, -and means for utilizing the movable motor as a tension weight on the cable to equilibrate the tractive eHort ofthe two motors.

16. The combination With an elevator car, of a rope or cable with ends attached to the top and bottom of the car, a counterweight for the car, a fixed motor, beams pivoted at 17. ln an elevator, the combination with a load-carrying device, of a motor, a flexible traction driving member having a fixed connection to the load'v carrying device held under tension by the Weight of the motor, and means independent of the Weight of the motor for ,varying said tension automatically. l 18. In an elevator, the combination With a car, of a hoisting rope or cable connected to travel with the. car, a drive sheave in frictional engagement with the cable, means for applyingtension through said sheave to both leads of the cable extending therefrom, and additional means for varying the tension in saidcable automatically.

19. The combination with a car, of a motor, and a traction driven hoistingrope or` liti@ lill@ lll ` nected thereto, an electric motor suspended hy the rope or cable and having a frictional driving connection therewitlnand means'in dependent of the weight of said'motor for varying the tension in said rope or cable when the car approaches its limit of travel. 21. In an elevator, the combination with a car, of a motor, a friction drive sheave connected to the motor, a hoisting rope or cable fixedly secured to the car and connecting the car and drive sheave and suspending the motor, means to prevent lateral displacement of the motor, and means dependent on the position of the car for varying 'the tension in said hoisting rope or cable.

22. In an elevator, the combination with a car, of a hoisting rope or cable, a driving motor for the cable movable vertically and forming a tension Weight for the calble, and a lifting motor operable `to lift the driving motor and reduce the tension on the cable.

23. In an elevator, the combination with a car, of a hoisting cable, a driving motor supported by said cable, a lifting motor, and automatic means for operating the-latter to take the Weight of the driving motor oif the hoisting cable.

24. In an elevator, 'the combination withl a car and counterweight, of a hoisting cable, a driving motor suspended by the cable, a lifting motor arranged to support the driving motor, and means controlled by the car and counterweight for automatically ei'ecting the operation of the lifting motor when the car approaches its limit of travel in either direction.

25. In an elevator,the combination with a car, of a hoisting cable, a driving motor therefor supported by the cable, a lifting motor operable into position to support the driving motor and take the Weight of the (topicsv of this patent may be obtained for ve cents each. by addressing the Washington, D. C.

latter oli' the driving cable, and automatically operated electro-'mechanical means-for effecting the operation of the lifting motor.

26. In an elevator, the combination with a car, of a hoisting cable, a driving .motor therefor suspended `by the cable, a fluid pressure lifting device for the notor, and means to automatically effect the operation of said device.

27. In an elevator, the combination with' a car, of a hoisting cable, a driving motor, and a hydraulic motor controlled by the car and operable to lift the driving motor.

28. In an elevator, the combination with a car, of a hoisting cable, a tension device for the latter, a motor operable to move said device into position to relieve the tension on the hoisting cable, and means to automati4 cally effect the operation of the said motor.

29. In an elevator, the combination with a car, of a hoisting cable, a tension Weight supported by said cable, a hydraulic-motor operable to lift said weight, a valve controlling the supply of pressure to the motor, a lever lo ted in position to be operated by the car, and an operating connection between said lever and the valve.

30. The combination with a car, ofahoisting cable, a driving motor, a drive sheave on the motor and in frictional engagement with the hoisting cable, a pivoted support to which the motor is connected, a device for lifting the gmotor, and means to automatically operate said device when thejcar Commissioner of Patents, 

